Apple produces good quality devices that can last you for years. Still, by taking precautions, you can keep your device alive longer and get the most for the money you spent on it.
To prevent devices from being downgraded to older versions that lack the latest security updates, iOS uses a process called System Software Authorization.
Apple spent two months and issued no less than 7 betas testing iOS 10.3, but just seven days later iOS 10.3.1 is here and it is dedicated to bug fixes and security patches.
Can one jailbreak iOS 10.3.1, 10.3 or iOS 10.2.1? If not, what is the latest current state of an iOS 10.3.1 / 10.3 / 10.2.1 jailbreak for iPhone and iPad?